所有其他的XPath处理工作都要从这个类开始，虽然看起来简单，但是应该习惯于输入这些代码。
All the rest of your XPath work will proceed from this class, though, so as simple as this looks, get used to typing it.
所以说假想自己适应了这个计划并且有铁一般的意志来坚持它已经算是足够疯狂了，对大多数人来说，它虽然看起来简单做起来却不容易。
So even assuming the subject is crazy enough to adjust to the schedule and iron-willed enough to stay on it, for many people it simply isn't possible.
我们先从一个具有欺骗性的功能造型开始：一个愚弄观看者的眼睛的简单外形，虽然看起来它有点功能性，但实际上一点也没有。
We started with a deceivingly functional form: a simple shape that, to fool the viewer's eye, looked like it did something, but in fact has no function at all.
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